libbinder_ndk: re-enable unit test case GetServiceThatDoesntExist

It was previously commented out because it took too much time, but it is
a good test case to have.

Test: atest libbinder_ndk_unit_tests
Change-Id: Icc148e46e40eaa5c746656c88aa79eb33223a4fd
diff --git a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
index 332b4ca..b2c412d 100644
--- a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
+++ b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
@@ -165,11 +165,10 @@
     return 1;  // should not return
 }
 
-// This is too slow
-// TEST(NdkBinder, GetServiceThatDoesntExist) {
-//     sp<IFoo> foo = IFoo::getService("asdfghkl;");
-//     EXPECT_EQ(nullptr, foo.get());
-// }
+TEST(NdkBinder, GetServiceThatDoesntExist) {
+    sp<IFoo> foo = IFoo::getService("asdfghkl;");
+    EXPECT_EQ(nullptr, foo.get());
+}
 
 TEST(NdkBinder, CheckServiceThatDoesntExist) {
     AIBinder* binder = AServiceManager_checkService("asdfghkl;");